Sunflower

1

Welcome to my presentation

Good Afternoon

&

2

Presented by:

Md. Rubel Mia12309056

3

Topic name:

Diseases of Sunflower & Their Management.

4

Content

About Sunflower

List of the diseases by pathogen

Symptoms & management of diseases

Pictures of some diseases

5

About Sunflower

English name: Sunflower

Scientific name: Helianthus annuus

Family: Asteraceae

Genus: Helianthus

6

List of sunflower diseases

Bacterial diseasesApical chlorosis Pseudomonas syringae pv. tagetis

Bacterial leaf spot Pseudomonas syringae pv. helianthi

Bacterial wilt Pseudomonas solanacearum

Crown gall Agrobacterium tumefaciens

7

Fungal diseases

Alternaria leaf blight Alternaria alternataDowny mildew Plasmopara halstediiPowdery mildew Erysiphe cichoracearumRust Puccinia helianthiSeptoria leaf spot Septoria helianthi

8

Nematodes

Pin Paratylenchus projectusLesion Pratylenchus hexincisus

Root knot Meloidogyne arenariaSpiral Helicotylenchus sp.Stunt Quinisulcius acutus

9

Viral diseases:

Aster yellows Aster yellows phytoplasmaSunflower mosaic Cucumber mosaic virus

Sunflower virus Tobacco mosaic virus

Chlorotic Mottle Sunflower Chlorotic Mottle virus (SuCMoV)

10

charcoal rot - Rhizoctonia bataticola

11

Management

Closer planting of the seedling should be avoided.

Treat the seeds with Carbendazim or Thiram at 2/kg

Symptoms

• The pathogen is seed-borne and primarily causes seedling blight

• The grown up plants also show symptoms after flowering stage.

12

Leaf blight - Alternaria helianthi

13

• The pathogen produces brown spots on the leaves, but the spots can also be seen on the stem, sepals and petals.

• The lesions on the leaves are dark brown with pale margin surrounded by a yellow halo.

Symptoms ManagementDeep summer

ploughing.Proper spacingClean cultivation

and field sanitation.

14

Rust - Puccinia helianthi

15

• Small, reddish brown pustules covered with rusty dust appear on the lower surface of bottom leaves.

• The black coloured telia are also seen among uredia on the lower surface.

Symptoms ManagementPrevious crop remains

should be destroyed.Removal of crop

residuesSpray Mancozeb at

2kg/ha.

16

Powdery mildew - Erysiphe cichoracearum

17

• The disease produces white powdery growth on the leaves White to grey mildew on the upper surface of older leaves.

Symptoms Management

Complete field and crop sanitation.

Early varieties should be preferred.

18

Head rot - Rhizopus sp.

19

Basal rot - Sclerotium rolfsii

20

Necrosis -Tobacco streak virus (TSV)

21

Have you any question ?

22

Thanks to all